G O M - 영 문
73
The boiler has a function that permit to wait, after each burner switch off for heating
demand, for certain period of time (from 0 to 600 seconds) in order to reduce noises
for too much frequent burner switch on.
This value (normally adjusted in the factory around 300 seconds) is adjustable as follows:
•
Press the and the left button and for at lest 10 sec up the digits start to blink
•
Press the , button in the left side up to the number 3 appears in the left digit.
A number included between 0 to 99 appears in the right digits
•
Press
…
, in the right side in order to arrange the AFCF up to the value desired.
The number included between 0 to 99, appearing in the right digits, represent the
percentage of 600 sec. adjusted.
The boiler has a function that relate the fan rotation speed to power capacity in order
to maintain an high level OF efficiency and an excellent combustion.
It may happen that, due to the particular poor gas calorific value, there are some
difficulties to ignite the burner.
In order to favorite the correct ignition, it
’
s possible to change the relation between
the power capacity and the fan speed in order to reduce the quantity of air during the
ignition stage.
•
Press the and the left button and for at lest 10 sec up the digits start to blink
•
Press the , button in the left side up to the number 6 appears in the left digit
The number 5 appears in the right digits.
The boiler in normally set in the 5 position(this is the reference condition).
•
Press
…
, in the right side in order to arrange the Gas Curve Correction to
the value desired.
•
Reducing the number from 5 to 0, the fan speed is reduced in comparison with
the theoretical one.
•
Increasing the number from 5 to 10, the fan speed is increased in comparison
with the theoretical one.
In case of ignition demand the absence of air flow is checked by the differential air
pressure switch.
The air pressure switch contact has to be in the OFF position.
Once checked the presence of air flow (with the contact switched ON) the heat
demand relay enables the burner control sub unit to work.
If no air flow is detected, after 15 sec from the fan energizing, the anomaly is
indicated in the display and the system remain in a waiting condition for the air flow
presence signal.
Anti Fast Cycling Function-AFCF
Fan Control and Air Flow Checking
Gas Curve Correction